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Humboldt County (California)

Religious Traditions, 2010

9,256 4,364 9,901 65 5,373 105,664
Evangelical Protestant Mainline Protestant Catholic Orthodox Other Unclaimed

Congregational adherents include all full members, their children, and others who regularly attend services. The 2010 reports contain incomplete counts of congregations and adherents belonging to the eight largest historically African-American denominations. These denominations are not included in the 2000 reports and are largely missing from the 1990 and 1980 reports.
[More information on the data sources]


Religious Bodies Tradition Family Congregations Adherents % Change
Churches of Christ Evangelical Protestant Baptist +1 -7 -3.2%
Conservative Baptist Association of America Evangelical Protestant Baptist +1 --- ---
United Methodist Church, The Mainline Protestant Methodist/Pietist +1 +647 +86.5%
American Baptist Association, The Evangelical Protestant Baptist 0 +200 +99%
Assemblies of God Evangelical Protestant Pentecostal 0 -405 -24.8%
Calvary Chapel Fellowship Churches Evangelical Protestant Pentecostal 0 --- ---
Christian Church (Disciples of Christ) Mainline Protestant Baptist 0 -69 -65.7%
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 0 -29 -23%
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 0 +910 +34.4%
Community of Christ Other Latter-day Saints 0 +136 +618.2%
Evangelical Covenant Church, The Evangelical Protestant Methodist/Pietist 0 -31 -14.4%
General Association of Regular Baptist Churches Evangelical Protestant Baptist 0 --- ---
Orthodox Church in America Orthodox Eastern Liturgical (Orthodox) 0 +27 +71.1%
Salvation Army Evangelical Protestant Holiness 0 +19 +13.2%
Southern Baptist Convention Evangelical Protestant Baptist 0 -828 -31.2%
Unitarian Universalist Association of Congregations Other Liberal 0 -27 -12.6%
United Church of Christ Mainline Protestant Presbyterian-Reformed 0 +23 +24.7%
Vineyard USA Evangelical Protestant Pentecostal 0 -33 -18.2%
Wesleyan Church, The Evangelical Protestant Holiness 0 -75 -50%
American Baptist Churches in the USA Mainline Protestant Baptist -1 -25 -4.6%
Bahá'í Other Other Groups -1 -9 -6.6%
Christian Churches and Churches of Christ Evangelical Protestant Baptist -1 -267 -73.8%
Church of the Nazarene Evangelical Protestant Holiness -1 -159 -15.5%
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism -1 -598 -48.8%
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist -1 +214 +54%
Evangelical Lutheran Church in America Mainline Protestant Lutheran -1 -857 -59.2%
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran -1 -108 -27.4%
Pentecostal Church of God Evangelical Protestant Pentecostal -1 +118 +37.2%
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed -1 -1149 -51.9%
Seventh-day Adventist Church Evangelical Protestant Adventist -1 -496 -31.6%
Catholic Church Catholic Catholicism -2 -15619 -61.2%
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal -2 -220 -26.8%
Apostolic Faith Mission of Portland, OR Evangelical Protestant Pentecostal --- --- ---
Christian Brethren Evangelical Protestant Ind. Fundamentalist --- --- ---
Church of Christ, Scientist Other Christian Science --- --- ---
Independent Fundamental Churches of America Evangelical Protestant Ind. Fundamentalist --- --- ---
Independent Yearly Meetings of Friends* Mainline Protestant European Free-Church --- --- ---
Jehovah's Witnesses Other Adventist --- --- ---
Lutheran Congregations in Mission for Christ Evangelical Protestant Lutheran --- --- ---
Non-denominational Evangelical Protestant
--- --- ---
Reform Judaism Other Judaism --- --- ---
United Pentecostal Church International Evangelical Protestant Pentecostal --- --- ---
Unity Churches, Association of Other Other Groups --- --- ---
Totals: -12 -18717 -41.3%

The population of Humboldt County, California was 126,518 in 2000; in 1990 it was 119,118. The total population changed 6.2%. The adherent totals of the religious groups listed above (46,951) included 37.1% of the total population in 2000.

The population of Humboldt County, California was 134,623 in 2010; in 2000 it was 126,518. The total population changed 6.4%. The adherent totals of the religious groups listed above (28,959) included 21.5% of the total population in 2010.

* In an effort to better match the ASARB standards for adherents, a few religious bodies changed the way their adherents were reported in 2010, including the Catholic Church, Amish groups, Friends groups, Jewish groups, the Church of Jesus Christ of Latter-day Saints, Non-denominational Christian Churches, and the United Methodist Church. This change does not affect any of the data in the newly released 2010 U.S. Religion Census: Religious Congregations & Membership Study. In fact, the data for these groups are now more comparable to that of other bodies than it was in previous decadal reports.

However, the change in methodology can distort assessments on growth or decline between 2000 and 2010 for each of these groups. County-level 2000 data using the new methodology are not readily available. ASARB staff has adjusted some 2000 county-level adherent statistics to allow for a more accurate picture on growth or decline. The revised maps and charts are now available on-line at for those who are interested in these trends.


2010 data were collected by the Association of Statisticians of American Religious Bodies (ASARB) and include statistics for 236 religious groups, providing information on the number of their congregations and adherents within each state and county in the United States. Clifford Grammich, Kirk Hadaway, Richard Houseal, Dale E. Jones, Alexei Krindatch, Richie Stanley and Richard H. Taylor supervised the collection. These data originally appeared in 2010 U.S. Religion Census: Religious Congregations & Membership Study, published by the Association of Statisticians of American Religious Bodies (ASARB). [More information on the data collection]

The adherence rate provides the number of adherents of a particular group per 1,000 population. For example, in 2010 the Episcopal Church had an adherence rate of 7.6 in Autauga County, Alabama. This means that about 8 out of every 1,000 people in Autauga County were Episcopalian.

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